<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <script>
    function fun () {
        console.log('函数方法');
        
    }
    try {
        var fun = 10;
        fun();

    }catch(e){
        console.log(e);
        
    }
    console.log('程序没有问题');

        ///自定义
    try {
        function fun2 (name){
            if(name==undefined){
                throw{errMag:'未传参数',code:10003};
            }
            console.log(name);
            
        }
        fun2()
    }catch (e){
        console.log(e.errMag);
        
    }finally{

    }
    console.log('fun2 执行之后');
    
    
    </script>
</body>
</html>